Rotary gas-engine.



E. BERLINER.

ROTARY GAS ENGINE. APPLICATION FILED SEPT. 21, 1911.

Patented July 16, 1912.

2 SHEBTSSHEET-1.

ZNVENTOR Atlamey i E. BERLINER. ROTARY GAS ENGINE. APPLICATION FILED SEPT. 21, 1911.

Patented July 16,1912.

2 SHEETS-SHEET 2.

INVENTOIRII w=====l 4%: a a} nnrrnn curios.

EMILE BERLINER, 0F WASEIHGTGN, DIfSTRICT 035 COLUMBKA, ASSIGNUR T0 GYEQ MOTOR COMQANY, 01 WAfiHIN'G-TGN, DISTRICT OF COLUMBIA, A GGRPORATION i3 1? THE DISTEIC'E OT. GOLUMBEA.,

EQTARY GAS-ENGINE.

Specification of Letters Patent;

Patented ma to, rein.

To all whom it may concern:

lie it known that l, EMILE Brennan, a citizen of the United States, residing at li ashington, in the District of Columbia, have invented certain new and useful Improvements in Rotary Gash-Engines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

The invention relates to new and useful improvements in gas engines, and more especially to the construction of the exhaust ports which are opened to give the initial relief to the expanded gases.

An object of the invention is to provide a. plurality of auxiliary or primary exhaust ports which are so constructed and arranged that the relief of the expanded gases may be quickly accomplished, with a minimum noise incident to such relief.

A further object of the invention is to provideauxiliary or primary exhaust ports which are uncovered by the stroke of the piston, which exhaust ports are so constructed that there is little or no waste of the lubricating oil from the piston through said ports. 4

A further object of the invention is to provide a cylinder for a rotary gas engine, which is iormed with a thickened Wall at thepart thereof adjacent the 'end of the stroke of the piston, in which thickened wall are located a plurality of closely spaced exhaust ports, whereby the number of exhaust ports relating to that generally in use may be increased without weakening the cyl inder.

These and other objects will in part be obvious, and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the invention,-Figure 1 is a plan view of a rotary engine casing having a plurality of cylinders attached thereto, one of said cylinders being insection and the remainder of the cylinders being broken. away, the cylinder .1n section having my improved auxiliary or primary exhaustports formed therein; Fig.

2 is a longitudinal section through a cylinder on a large scale, showing the piston in position for uncovering the auxiliary or primary exhaust ports; Fig. 3 is a view similar to Fig. 2. showing another form of exhaust port.

l have shown my invention as applied to a rotary gas engine which includes an en g-ine casing I mounted on a shaft 2. so that said casing may rotate thereon. Said engine casing l, as herein illustrated, supy'iorts seven cylinders 3. All of the cylinders are alike in -c mstruction. and, therefore, only one is shown in detail. The cylinder 3 is provided with an opening l in its outer end, in which is seated a spider 43 having a seat for the main exhaust valve The main exhaust valve may be controlled in any desirahlc way. Reciprocating within the cylinder is a piston I which is pivoted to a piston rod connected to acrank of usual construction on the shaft 2. The piston '2 may he provided with an intake valve 9, so that the gases for operating the engine may he passed into the crank casing and through the inlet valves 9 into the cylinders. It will be obvious, lmwever, from certain aspects of the invention, that the cylinders may he sup plied with a fresh charge of gas in any of the well known ways.

In order that the cylinder may be quickly relieved of the expanded gases, l have'provided a plurality of auxiliary or primary exhaust ports i0, that is, ports through which the expanded gases may be given an initial or first relief prior to the opening of the main exhaust valve. The cylinder adjacent the end of the piston stroke is thickened as at ll, and said auxiliary exhaust ports are arranged in said thickened portion and are preferably in clincd to the wall of the cylinder. so that the longitudinal axes thereot meet at common point in the combustion chamber, and have an enlarged or hell month, which allows the. expansion of the exhaust gas and deadens the noise. This-is the preferred form but it. will be und1. '-'r.-itomlv that the form of exhaust port showirinf'l ig. 3 may be used. By providing the thickened portion 11, I

am able to increase the number of auxiliary ports over what has heretofore been used, without in any way weakening the cylinder at this point. By this increased number of auxiliary exhaust ports, I am able to very quickly relieve the cylinder of the ex )anded gases. Of course, after the initia relief of the gases, the remainder of the burned gases are forced through the main exhaust "valve 6. Furthermore, by the inclined exhaust port which is preferably circular in cross section,-the opening of the exhaust port into the cylinder will be elliptical in shape, with the major axis of the ellipse extending longitudinally of the cylinder. While, therefore, the gases are quickly relieved through the number of exhaust ports, yet the gases will be. gradually released in each exhaust port, and, therefore, the noise incident to the initial relief of the expanded gases is reduced to a minimum.

In a rotary gas engine having a number of cylinders, such as illustrated in Fig. 1, the length of the cylindrical portion of the piston is necessarily limited, for the reason that if said cylindrical portion extends into the casing upon the extreme inward stroke of the piston, it is liable to contact with the cylindrical portion of the piston. in the nextadjacent cylinder.

It has been. found desirable also to lubricate the piston by supplying lubricating oil. thereto through the crank casing. The centrifugal force will carry the lubricating oil out into the cylinders, and by the use of a 'cone-sl1aped guard 12, the oil will be properly directed to the wearing surfaces of the piston. However, when an engine casing is provided with the usual auxiliary exhaust ports, which are uncovered by the piston as it moves to the outer end of its stroke, there is a loss of the lubricating oil through the auxiliary exhaust ports. As the oil is carried outward by centrifugal force, it will pass into these ports, and if the ports are arranged at right angles to the walls of the cylinder, it will creep outward through said ports. It is consequently necessary to provide the ports with valves to prevent the loss of thelubricating oil. Furthermore, as the piston moves inward to uncover the exhaust ports, the lubricating oil in the ports will be blown out and burned with the escaping hot gases. By my construction, however, wherein the auxiliary exhaust ports are inclined relative to the wall of the cylinder, and also inclined so that any lubricant in said ports will be carried by centrifugal force along the walls thereof into the cylinder, rather than out of the same, I am able to prevent the escape of any of the lubricant through. the auxiliary ports without the use of any valves for closing the same.

While I have described the auxiliary ports 10 as exhaust ports, to allow an initial relief of the expanded gases, it is obvious that these ports may be used for any other purpose, such as an intake for air.

It is obvious that minor changes in the.

details of construction and arrangement of parts may be made, without departing from the spirit of my invention, as set forth in the appended claii'ns.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent,is

l. A rotary cylinder gas engineincluding in combination, a rotating cnnk casing, a cylinder carried thereby and rotating therewith, saidcylinder having a plurality of primary ports extending through the wall thereof and inclined backward toward the crank casing, a piston reciprocating in said cylinder, said ports being so disposed as to be uncovered by the piston as it reaches the end of its stroke following explosion.

2. A rotary cylinder gas engineincluding in combination, a cylinder, a rotating crank casing for rotatably supporting said eylinder, said cylinder having a plurality of primary ports extending through the wall ofthe cylinder, said ports being inclined l backward toward the crank casing and toward a common point within the combus- .tion chamber, and a reciprocating piston within the cylinder, said ports being disposed so as to be uncovered by the piston as it reaches the end of its stroke following explosion.

A rotary cylinder gas engine including in combination, a rotating crank casing, a cylinder carried thereby and rotating therewith, said cylinder having a thickened wall at a point adjacent the inner extreme throw of the piston, and a plurality of closely spaced primary ports extending through said thickened wall of the cylinder and in clined backward toward the crank casing.

at. A rotary cylinder gas engineincluding in combination, a rotating crank casing, a cylinder carried thereby and rotating therewith, said cylinder having a thickened wall at a point adjacent the inner extreme throw of the piston, and a plurality of closely spaced primary ports extending through said thickened wall of the cylinder, and inclined backward toward the crank casing, each of said ports having their outer ends enlarged to allow the expansion of the exhaust gases.

5. A rotary cylinder gas engine including in combination, a rotating crank casing, a cylinder carried thereby and rotating therewith having a thickened wall at a point adjacent the inner extreme throw of the piston and a plurality of primary ports extending through said thickened wall of the cylinder, said ports being inclined back- Ward toward the crank casing, the openings in the inner face of the cylinder formed by said ports, being elliptical in shape, Where 5 by said ports are gradually uncovered by the piston, and a reciprocating piston for the cylinder.

In testimony whereof I aflix my signature in presence of two Witnesses.

EMILE BERLINER.

Witnesses:

E. H. PARKINS, GRACE P. BRERETON. 

